June 2012
Beginner to intermediate
268 pages
8h 59m
English
Content preview from Shadow Algorithms Data Miner
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168 5. Other Treatments of Shadows
Laine and Karras [327] devise a scheme based on a tight bounding volume for
each triangle in order to scan-convert it into a cube-map around each point to be
shaded to identify which of its low-discrepancy directions are blocked by this trian-
gle. Although less ecient than their ray casting solution in the same paper [327],
Laine and Karras’ method shows much improvement compared to an ecient ray
casting solution.
McGuire [401] analytically computes the occlusion factor at a point to be
shaded for each triangle in a scene. He builds some kind of “ambient shadow vol-
ume” around each scene triangle to determine
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